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-rw-r--r--third_party/heimdal/lib/gssapi/krb5/encapsulate.c153
1 files changed, 153 insertions, 0 deletions
diff --git a/third_party/heimdal/lib/gssapi/krb5/encapsulate.c b/third_party/heimdal/lib/gssapi/krb5/encapsulate.c
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+++ b/third_party/heimdal/lib/gssapi/krb5/encapsulate.c
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+/*
+ * Copyright (c) 1997 - 2003 Kungliga Tekniska Högskolan
+ * (Royal Institute of Technology, Stockholm, Sweden).
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * 3. Neither the name of the Institute nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include "gsskrb5_locl.h"
+
+void
+_gssapi_encap_length (size_t data_len,
+ size_t *len,
+ size_t *total_len,
+ const gss_OID mech)
+{
+ size_t len_len;
+
+ *len = 1 + 1 + mech->length + data_len;
+
+ len_len = der_length_len(*len);
+
+ *total_len = 1 + len_len + *len;
+}
+
+void
+_gsskrb5_encap_length (size_t data_len,
+ size_t *len,
+ size_t *total_len,
+ const gss_OID mech)
+{
+ _gssapi_encap_length(data_len + 2, len, total_len, mech);
+}
+
+void *
+_gssapi_make_mech_header(void *ptr,
+ size_t len,
+ const gss_OID mech)
+{
+ u_char *p = ptr;
+ int e;
+ size_t len_len, foo;
+
+ *p++ = 0x60;
+ len_len = der_length_len(len);
+ e = der_put_length (p + len_len - 1, len_len, len, &foo);
+ if(e || foo != len_len)
+ abort ();
+ p += len_len;
+ *p++ = 0x06;
+ *p++ = mech->length;
+ memcpy (p, mech->elements, mech->length);
+ p += mech->length;
+ return p;
+}
+
+void *
+_gsskrb5_make_header (void *ptr,
+ size_t len,
+ const void *type,
+ const gss_OID mech)
+{
+ u_char *p = ptr;
+ p = _gssapi_make_mech_header(p, len, mech);
+ memcpy (p, type, 2);
+ p += 2;
+ return p;
+}
+
+/*
+ * Give it a krb5_data and it will encapsulate with extra GSS-API wrappings.
+ */
+
+OM_uint32
+_gssapi_encapsulate(
+ OM_uint32 *minor_status,
+ const krb5_data *in_data,
+ gss_buffer_t output_token,
+ const gss_OID mech
+)
+{
+ size_t len, outer_len;
+ void *p;
+
+ _gssapi_encap_length (in_data->length, &len, &outer_len, mech);
+
+ output_token->length = outer_len;
+ output_token->value = malloc (outer_len);
+ if (output_token->value == NULL) {
+ *minor_status = ENOMEM;
+ return GSS_S_FAILURE;
+ }
+
+ p = _gssapi_make_mech_header (output_token->value, len, mech);
+ memcpy (p, in_data->data, in_data->length);
+ return GSS_S_COMPLETE;
+}
+
+/*
+ * Give it a krb5_data and it will encapsulate with extra GSS-API krb5
+ * wrappings.
+ */
+
+OM_uint32
+_gsskrb5_encapsulate(
+ OM_uint32 *minor_status,
+ const krb5_data *in_data,
+ gss_buffer_t output_token,
+ const void *type,
+ const gss_OID mech
+)
+{
+ size_t len, outer_len;
+ u_char *p;
+
+ _gsskrb5_encap_length (in_data->length, &len, &outer_len, mech);
+
+ output_token->length = outer_len;
+ output_token->value = malloc (outer_len);
+ if (output_token->value == NULL) {
+ *minor_status = ENOMEM;
+ return GSS_S_FAILURE;
+ }
+
+ p = _gsskrb5_make_header (output_token->value, len, type, mech);
+ memcpy (p, in_data->data, in_data->length);
+ return GSS_S_COMPLETE;
+}